TechJapan: "Kokuyo Store Creation Corporation released the "Narupane" poster panel which can produce sound.It appears to be a standard panel for displaying a poster at first, but the back panel is actually a speaker, allowing it to play music and voices. Since it feels as though the poster itself is producing the sound, Kokuyo Store Creationg explained that "in addition to the visual, it is a media that allows you to appeal to the sense of hearing as well."